LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1988 >> Seville Base >> Repair and Diagnosis >> Engine Performance >> Ignition System - HEI-Est >> Testing >> ESC Performance Check >> Non-controller Equipped
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Non-controller Equipped

  1. With engine at normal operating temperature, increase engine speed to about 1500 RPM. Tap on engine lift hook bracket while observing engine timing. If timing retards system is operating properly.
  2. If timing did not retard in step 1), disconnect knock sensor. Connect voltmeter positive lead to knock sensor and negative lead to ground. Set voltmeter on 2-volt AC scale.
  3. Tap on engine block near knock sensor. Voltage should be indicated while tapping on block. If voltage is indicated, check for improper installation of MEM-CAL. If installed properly, replace faulty MEM-CAL or ECM. If voltage is not indicated, replace knock sensor.
scientia non olet · About LEMON Manuals